Changing sideloading subtitle track with hls contents, video/audio renderers are resetted for a while

[HyowonHwang]

ExoPlayer Version

2.17.1

Devices that reproduce the issue

Samsung Z Flip3 os 12
All devices.

Devices that do not reproduce the issue

No response

Reproducible in the demo app?

Yes

Reproduction steps

1. Add information of external subtitle to any hls contents in media.exolist.json

{
      "name": "Apple multivariant playlist advanced (TS)",
      "uri": "https://devstreaming-cdn.apple.com/videos/streaming/examples/img_bipbop_adv_example_ts/master.m3u8",
      "subtitle_uri": "https://storage.googleapis.com/exoplayer-test-media-1/webvtt/numeric-lines.vtt",
      "subtitle_mime_type": "text/vtt",
      "subtitle_language": "en"
    }

2. Change text track to external subtitle.
3. Player state change to Buffering -> Ready shortly.

Expected result

It should change without reset of audio/video renderers.

This only happen playing external subtitles when playing hls contents.

With 2.16.0 release, it goes well.

Actual result

Audio/Video renderers are resetted for a while.

Media

Modify media from demo app

{
      "name": "Apple multivariant playlist advanced (TS)",
      "uri": "https://devstreaming-cdn.apple.com/videos/streaming/examples/img_bipbop_adv_example_ts/master.m3u8",
      "subtitle_uri": "https://storage.googleapis.com/exoplayer-test-media-1/webvtt/numeric-lines.vtt",
      "subtitle_mime_type": "text/vtt",
      "subtitle_language": "en"
    }

Bug Report

[tonihei]

Thanks for reporting! This is indeed a bug we introduced in 2.17.0 caused by a missing equals method. We'll provide a fix in the next release.

[HyowonHwang]

@tonihei Thanks for response. I will check it again with next release.

[tonihei]

This is fixed by the commit above.